linux-kernel - [PATCH v6 5/6] MIPS: Loongson 2F: Add clk_get

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Date:   Fri, 16 Nov 2018 14:59:36 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Huacai Chen <chenhc@...ote.com>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>, linux-mips@...ux-mips.org
Subject: [PATCH v6 5/6] MIPS: Loongson 2F: Add clk_get_optional() function

clk_get_optional() returns NULL if not found instead of -ENOENT,
otherwise the behaviour is the same as clk_get().

Signed-off-by: Phil Edworthy <phil.edworthy@...esas.com>
---
 arch/mips/loongson64/lemote-2f/clock.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/mips/loongson64/lemote-2f/clock.c b/arch/mips/loongson64/lemote-2f/clock.c
index 8281334df9c8..abbade58b635 100644
--- a/arch/mips/loongson64/lemote-2f/clock.c
+++ b/arch/mips/loongson64/lemote-2f/clock.c
@@ -53,6 +53,17 @@ struct clk *clk_get(struct device *dev, const char *id)
 }
 EXPORT_SYMBOL(clk_get);
 
+struct clk *clk_get_optional(struct device *dev, const char *id)
+{
+	struct clk *clk = clk_get(dev, id);
+
+	if (clk == ERR_PTR(-ENOENT))
+		clk = NULL;
+
+	return clk;
+}
+EXPORT_SYMBOL(clk_get_optional);
+
 static void propagate_rate(struct clk *clk)
 {
 	struct clk *clkp;
-- 
2.17.1